Electronic apparatus with antennas

Abstract

According to one embodiment, an electronic apparatus includes a housing in which an electrically conductive layer is formed on an inner surface of the housing, a flat-panel display which is accommodated in the housing, a first antenna which is disposed on the conductive layer, a part of the first antenna being located more on an outer peripheral side than a side of the conductive layer, and a second antenna which is disposed on the conductive layer, a part of the second antenna being located more on the outer peripheral side than the side of the conductive layer. The conductive layer includes a notch which is formed in a predetermined position of a side of the conductive layer, which is located between the first antenna and the second antenna, the notch having a length of ¼ of a wavelength corresponding to a resonance frequency of the first antenna.

1. An electronic apparatus comprising:
 a housing in which an electrically conductive layer is formed on an inner surface of the housing; 
 a flat-panel display which is accommodated in the housing, with a back surface of the flat-panel display being opposed to the electrically conductive layer; 
 a first antenna which is disposed on the electrically conductive layer, a part of the first antenna being located more on an outer peripheral side than a side of the electrically conductive layer; and 
 a second antenna which is disposed on the electrically conductive layer, a part of the second antenna being located more on the outer peripheral side than the side of the electrically conductive layer, 
 wherein the electrically conductive layer includes a notch formed in a predetermined portion of a side of the electrically conductive layer, which is located between the first antenna and the second antenna, the notch having a length of ¼ of a wavelength corresponding to a resonance frequency of the first antenna. 
 
   
   
     2. The electronic apparatus according to  claim 1 , wherein the first antenna further has another resonance frequency, and
 the electrically conductive layer further includes another notch which is formed in a predetermined position on the side, that is located between the first antenna and the second antenna, said another notch having a length of ¼ of a wavelength corresponding to said another resonance frequency of the first antenna. 
 
   
   
     3. The electronic apparatus according to  claim 1 , further comprising:
 a first wireless communication module which is electrically connected to the first antenna and executes wireless communication by a first wireless communication scheme; and 
 a second wireless communication module which is electrically connected to the second antenna and executes wireless communication by a second wireless communication scheme. 
 
   
   
     4. The electronic apparatus according to  claim 3 , wherein a transmission power of the first wireless communication module is higher than a transmission power of the second wireless communication module. 
   
   
     5. The electronic apparatus according to  claim 1 , wherein a distance between the first antenna and the second antenna is an integer number of times of the length of ¼ of the wavelength which corresponds to the resonance frequency of the first antenna. 
   
   
     6. The electronic apparatus according to  claim 1 , wherein the electrically conductive layer is formed in a rectangular shape,
 the first antenna and the second antenna are disposed on an upper side of the electrically conductive layer, and 
 the notch is formed in a predetermined position of the upper side, which is located between the first antenna and the second antenna. 
 
   
   
     7. The electronic apparatus according to  claim 6 , wherein the notch includes a first notch portion extending from the predetermined position on the upper side toward a lower side of the electrically conductive layer, and a second notch portion extending from an end of the first notch portion toward a lateral side of the electrically conductive layer. 
   
   
     8. The electronic apparatus according to  claim 6 , wherein the first antenna further has another resonance frequency, and
 the electrically conductive layer further includes another notch which is formed in a predetermined position of the upper side, that is located between the first antenna and the second antenna, said another notch having a length of ¼ of a wavelength corresponding to said another resonance frequency of the first antenna. 
 
   
   
     9. The electronic apparatus according to  claim 1 , wherein the electrically conductive layer is formed in a rectangular shape,
 the first antenna is disposed on a lateral side of the electrically conductive layer, and the second antenna is disposed on an upper side of the electrically conductive layer, and 
 the notch is formed in one of a predetermined position of the lateral side, which is located between the first antenna and the second antenna, and a predetermined position of the upper side, which is located between the first antenna and the second antenna.